vp9_ref_frame    3781 libavcodec/vp9.c         (res = vp9_ref_frame(ctx, &s->frames[LAST_FRAME], &s->frames[CUR_FRAME])) < 0)
vp9_ref_frame    4070 libavcodec/vp9.c             if ((res = vp9_ref_frame(dst, &s->frames[i], &ssrc->frames[i])) < 0)